GM Service Manual Online
For 1990-2009 cars only

Removal Procedure


    Object Number: 673597  Size: SH
  1. Disconnect the engine coolant heater cord from the engine coolant heater.
  2. Remove the engine coolant heater cord clip bolt.
  3. Remove the engine coolant heater cord strap at the secondary air injection pump hose.
  4. Remove the engine coolant heater cord.

Installation Procedure


    Object Number: 581687  Size: SH
  1. Install the engine coolant heater cord to the engine coolant heater.
  2. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  3. Position the engine coolant heater cord clip and install the bolt.
  4. Tighten
    Tighten the engine coolant heater cord clip bolt to 32 N·m (24 lb ft).


    Object Number: 673600  Size: SH

    Important: The engine coolant heater cord must not contact the engine, pipes, manifold or any moving parts. Always keep the electrical cord neatly rolled up with the plug end of the cord tucked into the center of the coil and secured in place with the supplied tie straps.

  5. Route the engine coolant heater cord over the generator.
  6. Coil the engine coolant heater cord into a bundle and secure the bundle to the secondary air injection hose pump with the strap.